One demonstration was against Turkey's offensive against Kurdish-controlled areas in northeastern Syria, while the other was ahead.

A big fight ensued inside a shop on the city's parade street Karl Johan. A group broke away from the counter-demonstration train, passing there, and stormed into a store.

-There was a fight between several people inside the store. There was some damage and in addition a fire extinguisher was triggered, says the police operations manager.

Tear gas

After the police used tear gas, three people could be arrested.

Earlier in the day, the crowd was used in another big riot with links to the demonstrations, where some were injured.

Seven people have been arrested, reports Norwegian media.